Demolition Contractor Exam

Ca C21 Building Moving And Demolition Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary safety concern when beginning demolition on an

older structure?

• Weather conditions
• Availability of workers
• Presence of hazardous materials
• Utility trenching

Rationale: Old structures often contain asbestos, lead, or other hazardous

materials requiring mitigation before any demolition begins.

• Before moving a building, what must be verified first?
• Number of occupants
• Structural integrity
• Wall color
• Insurance cost

Rationale: The building must be structurally sound enough to withstand

lifting and transport.

• Which equipment is most commonly used for selective interior

demolition? 1 / 3

• Tower crane
• Skid-steer with demolition attachments
• Asphalt paver
• Boom lift

Rationale: Skid-steers with breakers or grapples are ideal for interior

teardown in confined spaces.

• What is the primary purpose of shoring during building movement?
• Reduce noise
• Increase ventilation
• Support loads to prevent collapse
• Provide anchoring points

Rationale: Shoring ensures the structure remains stable during lifting and

transport.

• Who is responsible for locating underground utilities before

excavation or demolition?

• The city inspector
• The contractor
• The architect
• The homeowner

Rationale: Contractors must request utility marking before disturbing soil

to avoid hazards.

• Which type of foundation typically requires cutting before lifting a

building?

• Pier
• Slab-on-grade
• Crawlspace
• Post-tension

Rationale: Slab-on-grade foundations must be separated from the structure

prior to lifting.

• What is the safest method to control dust in mechanical demolition? 2 / 3

• Using leaf blowers
• Applying water spray
• Increasing machine power
• Demolishing faster

Rationale: Water spray suppresses airborne dust and meets regulatory

requirements.

• Which document verifies legal authority to move a structure on public

roads?

• Jobsite safety plan
• Oversize load permit
• Insurance binder
• Demolition plan

Rationale: Moving large structures requires oversize load permits for street

use.

• What is the typical first step in a complete building demolition

sequence?

• Removing the roof
• Disconnecting utilities
• Loading debris
• Breaking the foundation

Rationale: Utilities must be shut off and capped before any demolition

begins to prevent hazards.

• When cutting steel beams during demolition, what hazard must be

monitored?

• Moisture levels
• Falling materials
• Color change
• Noise level

Rationale: Cut steel can shift or fall suddenly as structural connections

release.

• / 3